RASTISLAV JANOTKA
Software DeveloperSolution ArchitectIntegrator
- Name
- Rastislav Janotka
- Role
- Solution Architect · Senior Backend & Integration Developer
- Since
- 1996
- Based in
- Sliač, Slovakia
- rasto.janotka@gmail.com
- Phone
- +421 944 158 556
- in/rastislav-janotka
- Languages
- Slovak, English
- Company
- Lunabyte s.r.o.
About me
I am a solution architect and senior backend developer with almost 30 years of experience. Since 1996 I have been designing and delivering integration solutions for large enterprises – telecom, banking, insurance and EU institutions.
I enjoy end-to-end architecture: from IoT devices and streaming platforms through API gateways, central authentication and message-driven integrations, to connecting enterprise systems. I build backends mainly in Jakarta EE, Spring Boot and Go, and reach for Rust where it fits. When a project needs it, I cover the frontend and DevOps as well.
I have repeatedly led legacy migrations and advised company leadership – including independent reviews of vendor proposals. On the side I build local AI/RAG systems on Kubernetes and I am learning Rust. Linux has been my daily driver for years.
- 30years of experience
- 12companies & institutions
- 5countries: SK CZ DE BE LU
Experience
A selection of client and employer engagements. The full CV is available on request.
2026 – …
Technical consultant & full-stack developer
SEPRON BB s.r.o.
POHODA ERP integration over XML API, rebuild of an e-shop into a B2B catalogue, technical advice for leadership and independent review of agency proposals.
2022 – 2025
Senior Java Backend & Integration Developer
Deutsche Telekom / T-Systems
Migrated a SharePoint connector to Jakarta EE, SPFx extensions, Entra ID authentication and automated CI/CD in an international team.
2017 – 2022
Solution Architect & Lead Developer
Xmusix / Yomie
Audio streaming platform for IoT set-top boxes: API gateway in Go, central authentication, HLS streaming and the full infrastructure.
2015 – 2017
Backend developer, GDPR & archiving
T-Com Slovakia (Slovak Telekom)
Archiving solution with a WebSocket protocol and Alfresco (CMIS). Designed the personal-data removal procedure across critical systems (Cramer, Genoa, Vitria, Siebel).
2012 – 2014
Developer & analyst
XmusiX Distributions
CRM/CMS for distributing music and advertising audio to venues. Architecture, data model and custom audio UI components.
2009 – 2012
Developer & analyst
Datalan (VÚB, Orange, T-Com)
Enterprise applications on JBoss, web services and JSF. Projects: Orange Web Shop, VÚB Hypo, T-Com hosting migration.
2006 – 2008
Java developer & analyst
Ľudová banka · Allianz · WV Leasing
Internet banking, leasing applications and Lotus Notes prototypes ported to Oracle.
1996 – 2004
Web developer & analyst
European Parliament · Dronex · HTC
Intranet applications for the European Parliament in Luxembourg and Brussels, Lotus Domino/Notes workflows and PHP/ASP solutions.
Tech
I pick language and framework by the job, not by fashion.
Languages
Backend & integration
Security & IAM
Data & messaging
DevOps & containers
AI & data processing
Frontend
Systems & networks
Contact
Looking for an architect, an integrator or a seasoned backend developer for your team? Drop me a line.
Send an e-mail